ASTM C578 Rigid, Cellular Polystyrene Thermal Insulation

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ASTM C578 Rigid, Cellular Polystyrene Thermal Insulation

ASTM C578 compression test of mortar grout polymer concrete specification covers the standards for the types, physical properties and dimensions of cellular polystyrene boards with or without facings or coatings made by molding (EPS) or extrusion (XPS) of expandable polystyrene proposed for use as thermal insulation. Products manufactured to the ASTM C578 specification are intended for use as thermal insulation for temperatures from negative 65 degrees Fahrenheit to positive 165 degrees Fahrenheit, equivalently negative 53.9 degrees Celsius to positive 73.9 degrees Celsius.

For Type XIII, the ASTM C578 specification covers the physical properties, and dimensions of cellular polystyrene intended for use as thermal insulation for temperatures from negative 297 to positive 165 degrees Fahrenheit, equivalently negative 183 to positive 73.9 degrees Celsius. The ASTM C578 specification, however, does not cover laminated products manufactured with any type of rigid board facer including fiberboard, perlite board, gypsum board, or oriented strand board. ASTM C578 specifies for all thermal insulation to be of uniform density and contain sufficient flame retardants to meet the oxygen index of requirements. All thermal insulation shall also meet the physical requirements such as thermal resistance, compressive resistance, flexural strength, water vapor permeance, water absorption, dimensional stability, and oxygen index specified herein ASTM C578.